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- O Nata Lux, SSAATTBB for mixed choir - Vytautas Miškinis
- O Salutaris Hostia, for mixed choir (SSAATTBB), soli - Ēriks Ešenvalds
- O Salutaris Hostia, for female choir / ensemble (SSAA) and two solo voices - Ēriks Ešenvalds
- Oculus non vidit, (SAAAATBBB) for mixed choir - Rihards Dubra
- Odu vakara deja (Mosquitoe`s Evening Dance), for mixed choir (SSAATTBB) - Ilona Rupaine
- Off You Go, All You Cadgers!, (SSAATTBB) for mixed choir - Juris Vaivods
- Oki, leji, leiten, for mixed choir (SSAATBB) - Ilona Rupaine
- Old Riga motives, for wind quintet and percussion - Alvils Altmanis
- Omnes sitientes venite ad aquas, oratorio, for 2 mixed choir, alto saxophone, 2 saxophone quartets (SATB), percussion and organ - Rihards Dubra
- On Christmas Eve, for mixed choir - Aivars Kalnins
- One More Weber opera, for clarinet and symphony orchestra - Pēteris Plakidis
- Only in Sleep, for mixed choir (solo S, SSATBB) and percussions - Ēriks Ešenvalds
- Oratio, for marimba and mixed choir (SSSAAATTBB) - Rihards Dubra
- Ostinato, for cello and orchestra - Romualds Kalsons
- Otra sonate (Second Sonata), for piano - Juris Karlsons
- Otra sonate (Second Sonata), for violin and piano - Maija Einfelde
- Ouverture à la fête , for flute, cello and harpsichord - Juris Karlsons
- Pa Durufle pedam (In the Footsteps of Duruflé), prelude, for organ - Dzintra Kurme-Gedroica
- Pako, for two pianos - Aivars Broks
- Panis Angelicus, (SATB) for mixed choir - Rihards Dubra
- Papardes zieds (Flower of Love), SSAATBB for mixed choir - Pēteris Plakidis
- Par puriemi, par meziemi (Over Marshes, Over Forests), SAAT/B) for mixed choir - Viktors Baštiks
- Parade March, for wind orchestra - Gunars Ordelovskis
- Parādīšanās (Appearances), for piano quintet - Rihards Dubra
- Pārcēlājs (Pontifex), oratorio, for mixed choir (SSSAAATTTBBB), soli (SATB) and instrumental ensemble - Valdis Muktupāvels
- Partita C-A-G-E, for violin, viola, bassoon and piano - Pauls Dambis
- Parvertibas (Conversions), for woodwind quintet and percussion - Alvils Altmanis
- Passion and Resurrection, oratorio, for soli, mixed choir and string orchestra - Ēriks Ešenvalds
- Pasticcio a`la Rossini, for violoncello and string orchestra - Pēteris Plakidis
- Pastorale, for flute, oboe and clarinet - Jānis Porietis
- Pater Noster, (SSATB) for mixed choir - Rihards Dubra
- Patiesība (Truth) I, II, for piano - Imants Zemzaris
- Pavasara mūzika (Spring Music), for mixed choir - Arturs Maskats
- Pavasara rotasana (Spring Celebrations), for womens choir - Selga Mence
- Peaceful Ramuli quitly dreams, for mezzo-soprano and piano - Andris Balodis
- Pērkonami melni zirgi, for mixed choir (SSSAAATTTBBB) and percussion (bd., rumba, tri.) - Vilnis Šmīdbergs
- Pianissimo, (SSAATTBB) for mixed choir - Andris Dzenītis
- Piano Pieces for Children, for piano - Liga Liepina - Kanepe
- Piano trio, for violin, violoncello and piano - Andris Vecumnieks
- Pie krusta (By the Cross), for mixed choir - Juris Ābols
- Pie zemes talas... (At the Edge of the Earth...), chamber oratorio, for twelve-voice mixed choir (SSSAAATTTBBB) - Maija Einfelde
- Piece for oboe and piano, for oboe and piano - Svens Renemanis
- Pieces for Piano, for piano - Lūcija Garūta
- Pieci bernu dzejoli (Five Settings of Children`s Verse),for five voices, for five voices (S or Ct, A or Ct, TBB) - Arturs Maskats
- Piedodosas Gaismas Litanija (Litany of the Forgiving Light), for organ - Rihards Dubra
- Pieminai (In Memoriam), for mixed choir - Jānis Porietis
- Pierrot, for alto saxophone - Andris Dzenītis
- Pigeon Post, for mixed choir, flute, accordion and two kokles - Andris Dzenītis
